Girls' Generation were guests on the September 1st filming for 'Yoo Hee Yeol's Sketchbook', where they talked about a variety of things we're really curious about.

The episode hasn't aired yet, but the show has given a few previews as to what the girls shared.

When asked about the Wonder Girls', Yuri replied, "Not too long ago, we met them at a broadcast station and we talked. It felt like we were all comrades together." Seohyunadded, "They changed their genre, and it was really cool. We've promoted together for so long, so it's an out-of-the-ordinary feeling."

The girls also talked about their ambitions for releasing songs they've personally written or composed. They shared, "We've tried a lot, but the company rejected them all. We think we have to add the lyrics 'an unknown world' or 'goddesses of fortune'," making the audience laugh.

About her composed song "Bittersweet & Crazy", Tiffany shared, "I wrote the lyrics staring at a wall for 10 hours." She also performed an acoustic version of her song, surprising and impressing MC Yoo Hee Yeol and the entire audience. We can't wait to see her perform it!

Their episode airs on September 5 at 12:10am KST!